问题
I am new at android. I am devloping an app that uses MySQL. The application runs well in the emulator. But now I need to run the app in a android device. What can I do.
回答1:
As stated in the first comment, you should check your file AndroidManifest.xml.
In order to access the network, it should contain the following instructions :
<uses-permission android:name="android.permission.INTERNET" />
You may also add the following, which enable your application to know the actual state of the network connection.
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
来源：https://stackoverflow.com/questions/21252879/android-device-connection-with-localhost-server